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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <script>
        function Person() {
        }
        Person.prototype.say = function () {
            console.log(222);
        }
        Person.prototype.eat = function () {
            console.log(333);
        }
        var suisui = new Person()
        var niuniu = new Person()
        var czy = new suisui.__proto__.constructor
        console.log(czy.__proto__.__proto__.__proto__)
        console.log(Object)
    </script>
</body>

</html>